Note 3 - Acquisitions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Videology [Member]
Revenue	$ 24,119	$ 45,974
Net earnings	$ 3,229	$ 6,061
Diluted earnings per share (in dollars per share)	$ 0.30	$ 0.57
Acculogic [Member]
Revenue	$ 24,550	$ 46,836
Net earnings	$ 2,582	$ 4,767
Diluted earnings per share (in dollars per share)	$ 0.24	$ 0.45